Improvement in oil-pumps



E. REW. Oil-Pum'vp.

No. 213,346. Patented Mar. 18,1879.

UNITED STATES PATENT OEEIcE,

EUGENE REV, OF FRIENDSHIP, NEW YORK, ASSIGNOR OF ONE-HALF HIS RIGHT TOJUSTICE A. REW, OF SAME PLACE.

IMPROVEMENT IN OIL-PUMPS.

Speciiication forming part of Letters Patent N o. 2l 3,346, dated March18, 1879; application led July 2, 1878.

To all 'whom fait may concern Be it known that I, EUGENE REW, ofFriendship, in the county of Allegany and State of New York, haveinvented new and useful Improvements in Oil-Pumps, of which thefollowing is a specification, reference being had to the accompanyingdrawings.

My improvement relates to an oil-pump in which, at the downward strokeof the piston or plunger, a portion of the oil raised above the standingvalve is forced in flue streams against the surrounding sand or rock,for the purpose of preventing the oil-yieldin g crevices of the latterfrom gumming up with paratne and other solid matter.

The object of my invention is to produce a simple and efticient devicewhich is readily applied to ordinary oil-pumps, and which does notinterfere with the ordinary use of the standing valve.

My invention consists of the particular construction of the ejectionapparatus7 as will be hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a vertical section ofthe partof an oil-pump to which my invention relates. Fig. 2 is a horizontalsection in line @c x, Fig. l. Fig. 3 is a fragmentary sectional view, onan enlarged scale, of one ofthe discharge-orifices.

Like letters of reference designate like parts in each of the figures.

A represents a piece or section of tubing, arranged between the lowerend of the workingbarrel of the pump and the upper end oftheanchor-tubin g, and provided with screw-threads a and b at its upper andlower ends, for connecting With the pump-barrel and the coupling B ofthe anchor-tubing, respectively. Gis the standing or suction valve,arranged in the lower part of the'straight bore of the tube-section A,so that it can be raised out of the pump when required. 1) is an annularenlargement or ring formed on the outside of the tube-section A, abovethe standing valve C. d represents narrow lateral bores or channelsformed in the enlargementD, so thattheirinner ends open into the bore ofthe tube-section A, while their outer ends are turned upward andprovided with a valve-seat, upon which rests a ballvalve, e. The latteris arranged in a cavity, f, formed in the enlargement D, and providedwith a lateral discharge-orifice, g.

H is a screw ring or collar secured to the upper portion of theenlargement D, so as to close all of the valve-cavities f; but, ifpreferred, each of these cavities may be closed separately by ascrew-plug. i is a removable screw-sleeve secured in thedischarge-orifice g, so that the size of the latter can be regulated byinserting therein a sleeve of greater or less bore, as may be desired.

The channels d are preferably formed by boring into the enlargement Dfrom the outside, and closing the outer port-ion of the bore, beyond theseat of the ball-valve, by means of a rivet or plug driven into thebore, as shown in the drawings.

The pump is placed in the well in the usual manner, with the anchor-pipeperforated at any desired point and the discharge-orifices g oppositethe oil-yielding rock. At the upward stroke of the piston the valveCrises and permits the influx of the oil into the tube-section A and theworking-barrel above the same. At the downward stroke of the piston thevalve C closes, and the greater portion of the oil above the standingvalve passes through the valve in the piston into the space of theworkin g-barrel above the piston. At the same time the valves e areraised by the pressure of the descending piston, and a small portion ofthe oil is forced in tine streams through the oriices g against thesurrounding rock'or sand, whereby the walls of the well are washed, andthe clogging up of the oil-yielding crevices by an accumulation ofparaftine is in a large degree prevented. Upon the upward stroke ot' thepump the valves e close, and the oil again enters the tube-section Athrough the anchortubing, as hereinbefore described.

The inner bore of the tube-section A being perfectly straight, thestanding valve C and its seat and cage can be withdrawn from the pumpwhenever it becomes necessary with the same facility as in ordinarypumps.

The ejecting mechanism is cheaply constructed and not liable to get outof order, as each ejection-orice is controlled by a sepa` rate valve,and therefore not affected by the clogging of any other valve.

outJ disturbing the surrounding parts, substantially as set forth.

2. The tube-section A, provided with annular enlargement D, channels d,valves e, ejection-orifices g, and screw-collar H, substantially as andfor the purpose set forth.

In witness whereof I have hereunto set my hand this 7th day of June,1878.

EUGENE REW.

Witnesses:

EDWARD WILHELM, JN0. J. BoNNEn.

